Most of the guides to English punctuation such as Trask (1997) and Todd (1995) claim that capital letters are used, inter alia: for the first word in a sentence or a line of poetry; for proper names <Bill>; for abbreviations (BBC); for a shortlist of words like <I>, <Tuesday>, <God>; and for content words in headings and book titles <The Case of the Worried Waitress>. A cursory glance shows that this analysis does not capture the language of the street. (Crossrefer to All Capitals).
Shop and business names
Informing signs
Bilingual notice, Sarajevo